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  1. C

    sleep mode help!

    You can combine .asm with mikroC
  2. C

    Need a Relay with Timer

    Where does the input voltage come from ?
  3. C

    series parallel RC circuit help

    Remove all the capacitors and you have three resistors in series. Add the values together. You have 120v and xxx ohms. Suppose you have 240 ohms. Across each ohm you have 0.5v. This means you divide xxx ohms by 120v to get yyy volts across each ohm. Now multiply yyy by 46 to get a result...
  4. C

    5 Ways to Harness Free Energy

    I have a source of one million tons of brown coal that costs me nothing. Now I can produce FREE ENERGY too.
  5. C

    Help to measure inrush current with an oscilloscope

    Place a one ohm resistor or even 0.1 ohm resistor in the positive lead and measure the voltage across the resistor. For a one ohm resistor, each mV of voltage will be equal to 1mA of current.
  6. C

    Volts and Amps

    You have to write a question using voltage and amps and we will correct it.
  7. C

    Are these components worth salvaging?

    Just keep them "as is" until you need them. And you might get some surface mount resistors and capacitors from the board too. It all depends on how much experimenting you do. A 2 cent part will cost $5.00 if you have to buy it.
  8. C

    Light Meter Problem

    Have you connected a 9v battery from the 0v rail to the +9v rail and another battery from the 0v rail to the -9v rail? Now remove the transistor and put a 1k then 10k then 47k then 100k then 220k then 330k in place of the transistor. If the LEDs don't change, the circuit is faulty.
  9. C

    Understanding the Transistor Amplifier

    At least this website gets a number of inquiries each day. Everyday Practical Electronics, the only magazine left in the UK gets 3 PER WEEK !!! It is on its last legs. And the same with Elektor. No-one has provided a .pdf of the magazine since July !!!! If I told you I would invent something...
  10. C

    Understanding the Transistor Amplifier

    "What I'd like to see change is Collin's Lone Ranger behavior. " I only give a short answer because I previously gave a long answer and less than 10% of my replies were taken up by the original poster. Even now, less than 10% of the replies are taken up or advanced upon.
  11. C

    Understanding the Transistor Amplifier

    Sorry, 227,000 visitors www.talkingelectronics.com/projects/TheTransistorAmplifier/TheTransistorAmplifier-P1.html Users online : 4 visitors today : 98 Page views today : 127 Total visitors : 227,356
  12. C

    Understanding the Transistor Amplifier

    I have a large eBook on THE TRANSISTOR AMPLIFIER and I approach it from a completely different angle than any text book. 22,000 have read the article and they say they have never been so informed. It's a non-mathematical approach because no maths can be applied as a transistor comes in batches...
  13. C

    Psychic amplification apparatus - calculating inductance??

    The circuit is never going to work. The FET needs a few voltage on the gate and the max you can get from the pot is less than 2v. It does not turn on !!!! Any psychic person can see that.
  14. C

    Code execution in ISR too slow.

    You have to talk about things in the form of instruction-cycles. We need to know the clock speed because it is divided by 4, so 20MHz will allow 5 instruction cycles of 1uS. The way I did it was to pole an input on a regular basis and take the result for processing. You can't do much with 5uS.
  15. C

    Programming PIC microcontroller

    The debugger will just frustrate you. You just need PICkit-2 to program the chips and MPASMWIN to take your program consisting of lines of assembly code and produce a .hex file
  16. C

    Light pulsing with bass

    We need to see the circuit so we can interface it to a microphone or "line-input" voltage
  17. C

    I need help building a solenoid controled by a rheostat

    You need to supply diagrams and then we can tell you to add a transistor so the rheostat (pot) will work.
  18. C

    Hfe question...

    The collector-emitter voltage is very high in the example above. Normally you want the c-e voltage to be less than 0.5v (for a number of reasons) and this is the first thing you should sort out. The next thing is to add a load to the circuit and work out how much current will flow through the...
  19. C

    Audio transformer for crystal set help

    The 100k base bias resistor is far too high. The transformer is only about 20 ohms The designer of the circuit does not understand electronics.
  20. C

    Screamingly easy o-scope problem

    My $3 scope has an output with 1v p-p square wave as a test signal. That's what you need.
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